Fraktální anisotropie a heterogenita lomových ploch oceli

The change in the fractal dimension of the fracture surface demonstrates a wavy character and dispersion depending on the microstructural state of the tested steel. The results of the fractal analysis in the crack growth direction and across the entire crack front were used as the basis for a reconstruction of the geometry of the fracture surface. The competing effects of transgranular and intergranular brittle fracture may lead to increased roughness of the fracture surface and its fractal dimension

Testing samples size effect on notch toughness of structural steels

In the paper notch toughness assessment of full scale testing samples (FS) form the upper bound toughness of sub-sized (SS) samples of structural carbon-manganese steels. The relations proposed by Schindler (2000) are in good agreement with experimental data. Empirical proportionality constant q* = 0,54 between notch toughness of full scale and sub-sized samples of studied structural steels agrees well with theoretically estimated constant q* = 0,50–0,54. More precise knowledge of the size effect of testing samples on temperature dependence of notch toughness requires an analysis of scatter in experimental data

Low temperature transcrystalline failure in spheroidized steels

This paper presents a comprehensive statistical theory of cleavage initiation in spheroidized steels, based on assessments of the microstructural conditions that govern cleavage in each of three characteristics temperature domains which differ by their controlling micromechanisms. The microscopic cleavage criteria, used in previous work on low-temperature transcrystalline cleavage, are reformulated so as to take into account possible misalignment between the stress direction and the perpendicular to a potential cleavage plane

Prediction of fracture toughness of 10MnNi2Mo steel

19.00; Translated from Czech. (Strojirenstvi 1986 v. 36(4) p. 234-240)SIGLEAvailable from British Library Document Supply Centre- DSC:9023.19(VR--3283)T / BLDSC - British Library Document Supply CentreGBUnited Kingdo

The effect of surface energy on plastic work of polycrystalline metallic materials

Translated from Czech (Kovove Mater. 1997 (5) p. 332-342)Available from British Library Document Supply Centre-DSC:9023.190(VR-Trans--8717)T / BLDSC - British Library Document Supply CentreSIGLEGBUnited Kingdo

The effect of size of testing samples on notch toughness of structural steels

Abstract We analyze notch toughness assessment of full scale testing samples (FS) form the upper bound toughness of sub-sized (SS) samples of structural carbon-manganese steels. The relations proposed by Schindler (2000) are in good agreement with experimental data. Empirical proportionality constant q* = 0.54 between notch toughness of full scale and sub-sized samples of studied structural steels agrees well with theoretically estimated constant q* = 0.50-0.54. More precise knowledge of the size effect of testing samples on temperature dependence of notch toughness requires an analysis of scatter in experimental data